[EN]Polylactides (PLAs) and their composites have been extensively employed as bone fixation devices due to their biodegradability and high tensile modulus. Incorporation of barium sulphate (BaSO4) particles to PLA matrix holds particular interest in this field because of the radiopaque properties of the resulting composites. Additionally, toughness of the polymeric matrix is impressively enhanced after the addition of BaSO4 with almost no adverse effect on the yield strength, providing a promising strategy in the design of materials that are intended to be used in safety-critical applications. However, this strategy affects the response to fatigue of the material. Thus, fatigue behavior of the neat polymer, the blend with BaSO4 and another blend with dopamine (DA) coated BaSO4 should be explored in order to determine how the filler influences in the crack growth and propagation.